Nexus choice for 2nd 5-star champ of game

Icepickisback

Only other 5-star champ is dragon man. Was excited to get a nexus crystal but not overwhelmed with the options. Who would you choose?

Yodabolt21

Aarkus will be more useful for you overall. X-23 is solid for bleed damage, but I’m sure some of your 4* will handle that better